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10 megohms is the resistance through which 10 volts would push 10 microamps of current. Input impedance is the resistance seen by a signal source when connected to the input
Often, this means there is a 10 megohm resistor in series with the input going to a virtual ground on an opamp circuit. 10 megohms is a common input impedance for a digital voltmeter.
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Input impedance of voltage amplifier?
In audio the input impedance of an amplifier is between 10 kiloohms and 20 kiloohms.
When 10 ohm resistor and 100 mega ohm resistor are connected in series then what will be the combined resistance?
100 megohm the 10 ohms completely vanishes in the tolerance of the 100 megohm resistor, in that range tolerances can exceed 20% of nominal.
How many ohm is a mega ohm?
1 megohm is 0.1 gigaohm. 1 gigaohm is 1000 megaohm. 1 megohm = 1,000,000 ohms = 106 ohms. 1 gigaohm = 1,000,000,000 ohms =109 ohms.
How does the loading effect of a voltmeter in a high-rsistance circuit compare to the loading effect in a low-resistance circult?
The voltmeter has an internal resistance, which should be as high as possible. As this resistance draws current from the circuit under test, it will affect circuit operation. This is more pronounced in a high impedance circuit because the current drawn flows through higher resistances.
Calculate the power out put of an amplifier that has an input of 15wand a gain of 25dB?
If you want to work in watts, convert 25dB to a scalling factor: 3dB = 2 x input 10dB = 10 x input 20dB = 100 x input ...25dB = 10 ^ (25/10) = 316.2 x input So the output is 15 Watts x 316.2 = 4.7kW If you want to work in dB, then convert 15 watts to dB: 10 * log |P| = dB = 10*log |15| = 11.76dB so the output is 11.76 + 25 = 36.76dB
Input impedance of voltage amplifier?
In audio the input impedance of an amplifier is between 10 kiloohms and 20 kiloohms.
How many ohms is the sending unit putting out?
Usually is the input impedance of the load 10 times higher than the input impedance of the sender. So the sender's ohms is one tenth of the load.
When testing circuits on modern vehicles the DVOM being used should have input impedance of at least?
10 mega ohms.
How do design a high voltage voltmeter?
Use a voltage divider and an standard high input impedance voltmeter connected to the low voltage output tap of the divider. Just check that: a) the voltage divider has enough resistance to minimize loading of the voltage source (The voltage divider resistance should be as high as possible). b) the voltmeter's input impedance is at least 10-20 times larger than the output resistance (impedance) of the divider. If necessary add a high-input impedance amplifier or a transducer between the divider output and the voltmeter. What is high voltage for you?
When 10 ohm resistor and 100 mega ohm resistor are connected in series then what will be the combined resistance?
100 megohm the 10 ohms completely vanishes in the tolerance of the 100 megohm resistor, in that range tolerances can exceed 20% of nominal.
What is input impedance of cro probe?
There are 2 types of CRO probes a. Active Probes (9 Megaohms) b. Passive Probes - hig voltage probe (10 to 1000 Megaohms)
Definition of low impedance medium impedance and high impedance?
For instance: A microphone rated at 150 ohms to 300 ohms is considered low impedance. About 600 to 2 000 ohms is medium impedance, and 10 000 ohms or more is high impedance.
Relation between wave length and size of the antenna?
To decrease antenna height For transmitting a signal of wavelength λ the antenna height must be λ/4. So if we want to send a 1 Hz (λ=3*10^8 m) signal ( very very low frequency) using an antenna , its height must be 75,000 Km ( impossible to build such a huge antenna ). If the same signal is modulated to some high frequency say 88 MHZ ( λ = 3.4 m ) , antenna height needed is 0.8522 m (quite easy to construct !!! ) (88 MHZ is the starting range of Frequency modulation which exists upto 108 MHZ).
Definition of low impedancemedium impedance and high impedance?
There is no precise definition, but for instance: A microphone rated at 150 ohms to 300 ohms is considered low impedance. About 600 to 2 000 ohms is medium impedance, and 10 000 ohms or more is high impedance.
If impedance of power transformer is increase from 8 to 10 percentage then what will effect?
if the designed value of percentage impedance is change, for general this should affect tow things * if the percentage impedance is decrease this should increase the fualt level current *if the percentage impedance is increase this should increase the transformer losses and tempreture rise so the designed value of percentage impedance is determined according IEC if it is less than or equal 10% the margin should be + or_ 15%, if it is more than 10% the margin should be + or _ 15% so the percentage impedance of this transformer is not accepted according IEC standers
How many ohm is a mega ohm?
1 megohm is 0.1 gigaohm. 1 gigaohm is 1000 megaohm. 1 megohm = 1,000,000 ohms = 106 ohms. 1 gigaohm = 1,000,000,000 ohms =109 ohms.
What does the medical abbreviation aif mean?
It could mean one of about 10 things depending how it is used, one example is arterial input function.
